Mulch bags vs bulk
The same bed can be quoted in 2 ft³ bags or loose cubic yards—compare both lines before you choose how it is delivered.
Bags, cubic yards, and the 13.5 factor
Retail mulch is often sold in 2 ft³ plastic bags. One cubic yard is 27 ft³, so a full yard equals 13.5 bags at that nominal size. Real bags vary, so the mulch calculator lets you edit bag volume and rounds bag counts up.
Bulk mulch is quoted in cubic yards loose. The same area and depth produces one math volume; you choose whether to read the result as bags or as yards to buy.
V7 example on a 100 ft² bed
A 100 ft² bed at 3 in deep, with 10% settling and hardwood mulch at 20 lb/ft³ needs 1.02 yd³ to buy (27.50 ft³). That is about 0.28 US tons, 550 lb, and 14 bags at 2 ft³ each. Many suppliers round bulk orders to the next 0.5 yd³, which would be 1.50 yd³ on this job.
That run is the V7 lock in the engine tests: 14 bags and 1.02 yd³ to buy for 100 ft² at 3 in deep with 10% settling on hardwood mulch at 20 lb/ft³.
Picking a delivery method
Bags let you pause the job, cover unused bundles, and walk mulch to tight side yards. Bulk is fewer handoffs when you have a clean driveway and a wheelbarrow path. Neither choice changes the underlying cubic yards—only how the supplier packages and prices it.
No mulch type is “best” for every bed; match particle size and fines to your plants and walkways, then order the volume this calculator already sized.
This guide explains the measurement the calculators use. It is not a design review or a soil report.
Use it on a calculator
FAQ
How many 2 ft³ bags are in a cubic yard?
One cubic yard is 27 cubic feet. Dividing 27 by 2 gives 13.5 bags per yard at a true 2 ft³ bag size. The mulch calculator uses your bag volume field, so if the label says 2.0 ft³ but the fill is short, lower the bag size and rerun the count.
When does bulk mulch make sense?
Bulk shines when you need several yards on one truck and can spread it quickly. Bags cost more per yard but are easier to store, move through gates, and place on sloped beds without a pile sliding. Compare the bag line and the bulk line on the calculator for the same depth and waste.
Why does the calculator add settling waste?
Mulch settles after spreading and watering. The default 10% waste on the mulch tool is a settling allowance you can change. It is not a recommendation for how deep the finished bed should look—that still comes from your 2–4 in planning depth.
Does wet mulch weigh more?
Yes. Rain-soaked mulch can be much heavier than the dry density used for planning. The site uses a dry hardwood figure for math; scale truckloads carefully after a storm and do not use the tons line as a bridge rating without checking with the supplier.
By Home Yard Calc Editorial Team · Sources listed on the methodology page · Last updated October 26, 2026